Documentation: add entries to filesystems/00-INDEX for several untracked files

Signed-off-by: Denis Cheng <crquan@gmail.com>
Cc: Rob Landley <rob@landley.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/filesystems/00-INDEX

@@ -44,10 +44,16 @@ files.txt
 	- info on file management in the Linux kernel.
 fuse.txt
 	- info on the Filesystem in User SpacE including mount options.
+gfs2.txt
+	- info on the Global File System 2.
 hfs.txt
 	- info on the Macintosh HFS Filesystem for Linux.
+hfsplus.txt
+	- info on the Macintosh HFSPlus Filesystem for Linux.
 hpfs.txt
 	- info and mount options for the OS/2 HPFS.
+inotify.txt
+	- info on the powerful yet simple file change notification system.
 isofs.txt
 	- info and mount options for the ISO 9660 (CDROM) filesystem.
 jfs.txt